Initialise local variables to null pointers [13.0.x]

[fwyzard]

PR description:

Initialise C strings to null pointers. Otherwise, when CUDA is not available, the CUDA stub library functions will not (re)set them, leaving them uninitialised.

PR validation:

Fixes testCudaCheck on ARM.

If this PR is a backport please specify the original PR and why you need to backport that PR. If this PR will be backported please specify to which release cycle the backport is meant for:

Backport of #40840 to CMSSW 13.0.x.

[cmsbuild]

A new Pull Request was created by @fwyzard (Andrea Bocci) for CMSSW_13_0_X.

It involves the following packages:

• HeterogeneousCore/CUDAUtilities (heterogeneous)

@cmsbuild, @makortel, @fwyzard can you please review it and eventually sign? Thanks.
@makortel, @missirol, @rovere this is something you requested to watch as well.
@perrotta, @dpiparo, @rappoccio you are the release manager for this.

cms-bot commands are listed here

• Backported from Initialize error and message variables in cudaCheck_() #40840

[fwyzard]

type bugfix

[fwyzard]

+heterogeneous

[fwyzard]

backport #40840

[fwyzard]

please test

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_13_0_X IBs after it passes the integration tests and once validation in the development release cycle CMSSW_13_1_X is complete. This pull request will now be reviewed by the release team before it's merged. @perrotta, @dpiparo, @rappoccio (and backports should be raised in the release meeting by the corresponding L2)

[fwyzard]

not urgent, but please merge for 13.0.0 to avoid unit test failures

[perrotta]

+1

• Not needed to wait for the result of the tests in the master IB: this can't hurt

[cmsbuild]

-1

Failed Tests: RelVals-INPUT
Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-03841f/30952/summary.html
COMMIT: 3e245d9
CMSSW: CMSSW_13_0_X_2023-02-28-1100/el8_amd64_gcc11
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week0/cms-sw/cmssw/40894/30952/install.sh to create a dev area with all the needed externals and cmssw changes.

RelVals-INPUT

The relvals timed out after 4 hours.

Comparison Summary

Summary:

• You potentially removed 17 lines from the logs
• Reco comparison results: 9 differences found in the comparisons
• DQMHistoTests: Total files compared: 49
• DQMHistoTests: Total histograms compared: 3557190
• DQMHistoTests: Total failures: 6
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 3557162
• DQMHistoTests: Total skipped: 22
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 48 files compared)
• Checked 213 log files, 164 edm output root files, 49 DQM output files
• TriggerResults: no differences found

[missirol]

@perrotta, looks like this didn't get merged.

[perrotta]

merge